Revision History for USGS Open-File Report 01-018 Edited by Timothy Parker, Kenneth L. Tanaka, and Derrick D. Hirsch Abstracts of the Annual Planetary Geologic Mappers Meeting, June 22-24, 2000 ----------------------------------------------------- Updated Web style and provided combined PDF March 16, 2012 (mfd) Migrated to http://pubs.usgs.gov/of/2001/of01-018/ November 16, 2006 (bwr) Posted online on the Geopubs server January 31, 2001 (cad) -----------------------------------------------------